Flexible touch display panel and method for manufacturing the same

ABSTRACT

A flexible touch display panel and a method for manufacturing the same are provided. First, a display mother substrate including a plurality of first pad sets and a flexible touch mother substrate including a plurality of second pad sets are provided. Next, a plurality of first openings are formed in the display mother substrate, and a plurality of second openings are formed in the flexible touch mother substrate. Then, the flexible touch mother substrate is adhered to the display mother substrate by an adhesive layer, in which each first opening exposes one of the second pad sets respectively, and each second opening exposes one of the first pad sets respectively. Afterward, a cutting process is performed to form a plurality of touch display units.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a flexible touch display panel and amethod for manufacturing the same, and more particularly, to a flexibleorganic light-emitting touch display panel and a method formanufacturing the same to shrink assembly process steps.

2. Description of the Prior Art

With the advance of technology, the flexible touch display panels havingboth the touch function as well as the display function have been widelyapplied to products for daily use. In general, the flexible organiclight-emitting touch display panel is formed by adhering a flexibletouch panel to an organic light-emitting display panel. However, theprior method for manufacturing the flexible touch display panel is tocut a flexible touch mother substrate formed with a plurality of touchpanel devices into a plurality of flexible touch panels and cut aflexible display mother substrate into a plurality of flexible displaypanels and then to bond flexible circuit boards to the flexible touchpanels and the flexible display panels respectively before adhering theflexible touch panels to the flexible display panels respectively, sothe formed flexible touch panel and the formed flexible display panelshould be adhered to each other one by one. Accordingly, the processsteps for manufacturing the flexible touch display panel are complex andtime-wasting, thereby increasing manufacturing cost.

SUMMARY OF THE INVENTION

It is therefore one of the objectives of the present invention toprovide a flexible touch display panel and a method for manufacturingthe same to simplify the process steps for manufacturing the flexibletouch display panel and reduce the manufacturing time and manufacturingcost.

An embodiment of the present invention provides a flexible touch displaypanel, including a display panel, a flexible touch panel, an adhesivelayer, a first circuit board, and a second circuit board. The displaypanel includes a first substrate, a display panel device and a pluralityof first pads. The display panel has a first opening. The firstsubstrate has a first surface, the display panel device is electricallyconnected to the first pads, and the display panel device and the firstpads are disposed on the first surface of the first substrate. Theflexible touch panel includes a second substrate, a touch panel deviceand a plurality of second pads. The flexible touch panel has a secondopening exposing the first pads, and the touch panel device and thesecond pads are disposed between the first substrate and the secondsubstrate, wherein the first opening exposes the second pads. Theadhesive layer is disposed between the display panel and the flexibletouch panel, wherein the adhesive layer doesn't overlap the first padsand the second pads in a vertical projection direction. The firstcircuit board is electrically connected and adhered to the first padsthrough the second opening. The second circuit board is electricallyconnected and adhered to the second pads through the first opening.

An embodiment of the present invention provides a method formanufacturing a flexible touch display panel, including the followingsteps. First, a display mother substrate and a flexible touch mothersubstrate are provided. The display mother substrate includes a firstsubstrate, a plurality of display panel devices and a plurality of firstpad sets, each display panel device is disposed corresponding to one ofthe first pad sets respectively, and the display panel devices and thefirst pad sets are disposed on the first surface of the first substrate.The flexible touch mother substrate includes a second substrate, aplurality of touch panel devices and a plurality of the second pad sets,each touch panel device is disposed corresponding to one of the secondpad sets respectively, and the touch panel devices and the second padsets are disposed between the first substrate and the second substrate.Then, a plurality of first openings are formed in the display mothersubstrate, and a plurality of second openings are formed in the flexibletouch mother substrate. Thereafter, the flexible touch mother substrateis adhered to the display mother substrate by an adhesive layer with thefirst surface of the first substrate facing the second surface of thesecond substrate as well as each display panel device being disposedcorresponding to one of the touch panel devices respectively to form amother substrate assembly. The adhesive layer does not overlap the firstpad sets and the second pad sets in a vertical projection direction.Each first opening exposes one of the second pad sets respectively, andeach second opening exposes one of the first pad sets respectively.Afterward, the mother substrate assembly is cut to separate the displaypanel devices from each other so as to form a plurality of touch displayunits. Next, a plurality of first circuit boards are adhered andelectrically connected to the first pad sets respectively through thesecond openings, and a plurality of second circuit boards are adheredand electrically connected to the second pad sets respectively throughthe first openings to forma plurality of flexible touch display panels.

In the method for manufacturing the flexible touch display panel of thepresent invention, the display mother substrate and the flexible touchmother substrate are adhered to each other first and followed by cuttingthe mother substrate assembly, and so the process step for adheringdifferent display panels to different flexible touch panels repeatedlycan be saved. Accordingly, the process steps for manufacturing theflexible touch display panels can be simplified so as to shrinkmanufacturing time and save manufacturing cost.

These and other objectives of the present invention will no doubt becomeobvious to those of ordinary skill in the art after reading thefollowing detailed description of the preferred embodiment that isillustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates a flowchart of a method formanufacturing a flexible touch display panel according to a firstembodiment of the present invention.

FIG. 2 to FIG. 9 schematically illustrate the method for manufacturingthe flexible touch display panel according to the first embodiment ofthe present invention.

FIG. 10 schematically illustrates a cross-sectional view of a flexibletouch display panel according to a second embodiment of the presentinvention.

FIG. 11 schematically illustrates a cross-sectional view of a flexibletouch display panel according to a third embodiment of the presentinvention.

DETAILED DESCRIPTION

Refer to FIG. 1 to FIG. 9. FIG. 1 schematically illustrates a flowchartof a method for manufacturing a flexible touch display panel accordingto a first embodiment of the present invention. FIG. 2 to FIG. 9schematically illustrate the method for manufacturing the flexible touchdisplay panel according to the first embodiment of the presentinvention, in which FIG. 2 schematically illustrates a top view of adisplay mother substrate according to the first embodiment, FIG. 3schematically illustrates a cross-sectional view of single one pixel ofthe display mother substrate according to an embodiment of the presentinvention, FIG. 4 schematically illustrates a top view of a flexibletouch mother substrate according to the first embodiment, FIG. 5schematically illustrates a top view of a touch panel device accordingto an embodiment of the present invention, and FIG. 9 schematicallyillustrates a cross-sectional view of the flexible touch display panelaccording to the first embodiment of the present invention. As shown inFIG. 1, the method for manufacturing the flexible touch display panel100 according to the first embodiment includes the following steps.First, step S10 is performed to provide a display mother substrate 102and a flexible touch mother substrate 104. As shown in FIG. 2, thedisplay mother substrate 102 may at least include two or more displaypanel unit regions 102 a, and the display mother substrate 102 includesa first substrate 106, a plurality of display panel devices 108 whichcorresponds to a display region and a plurality of first pad sets 110.Each display panel device 108 is disposed corresponding to one first padset 110 respectively, and each display panel device 108 and thecorresponding first pad set 110 can be disposed on the first surface 106a of the first substrate 106 in the corresponding display panel unitregion 102 a. Specifically, each first pad set 110 may include aplurality of first pads 110 a, and the display mother substrate 102 mayfurther include a plurality of conductive lines CL1 in each displaypanel unit region 102 a. Each first pad 110 a is electrically connectedto the corresponding display panel device 108 by each conductive lineCL1 respectively, so that each display panel device 108 can beelectrically connected to the external circuit.

Furthermore, the first substrate 106 may be selectively a flexiblesubstrate which material may be a flexible material, such as plastic,polyimide (PI), polyethylene terephthalate (PET), cycloolefin copolymer(COC) or polycarbonate (PC), and a bendable radius of the firstsubstrate 106 may be from 1 mm to 10 mm (R1˜R10), preferably from 1 mmto 5 mm (R1˜R5). For this reason, the display mother substrate 102 canbe flexible. Each display panel device 108 may include a plurality ofpixels PX used to display a whole frame, and the pixels PX define arange of the display region. For example, the range of each displaypanel device 108 may serve as the display region, and each first pad set110 is disposed in a peripheral region 108 a of the correspondingdisplay panel unit region 102 a. As shown in FIG. 3, each pixel PX mayinclude a switch transistor (not shown in figures), a driving transistorDT and a light-emitting device LD, in which the light-emitting device LDmay be for example an organic light-emitting diode that includes a pixelelectrode PE, an organic light-emitting layer OL and a cathode CE, butthe pixels of the present invention are limited thereto. Thelight-emitting device LD may also be another self-emissive device, suchas an inorganic light-emitting diode or a quantum dot material. Inanother embodiment, the display panel device 108 may also includeanother kind of display panel device, such as an electrophoresis displaypanel device, an electrowetting display panel device, an electro-powderdisplay panel device, a field emission display panel device or a plasmadisplay panel device. Since the organic light-emitting layer OL isself-emissive, and different sub-pixels in one of the pixels PX mayinclude the organic light-emitting layers OL formed of differentmaterials to generate lights with different colors, such as threeprimary colors, the display mother substrate 102 may not have colorfilters, but the present invention is not limited thereto. In thisembodiment, the display mother substrate 102 may include anencapsulation layer EN covering all of the display panel devices 108 andextending onto the first surface 106 a of the first substrate 106, andaccordingly, the encapsulation layer EN may encapsulate the displaypanel devices 108 on the first substrate 106. The encapsulation layer ENhas a function of blocking moisture and oxygen so as to prevent theorganic light-emitting layers OL of each display panel device 108 fromdamage caused by the moisture and oxygen before adhering the flexibletouch mother substrate 104 to the display mother substrate 102. Forinstance, the encapsulation layer EN may be a stack or a mixture oforganic material or inorganic material, but not limited thereto. Theinorganic material may be closer to the display panel device 108 thanthe organic material, but not limited thereto. The organic material maybe for example polyethylene terephthalate (PET), poly(ethylenenaphthalate) (PEN) or PI. The inorganic material may be for examplesilicon oxide, aluminum oxide or silicon nitride. It should be notedthat the encapsulation layer EN is formed after the formation of thefirst pads 110 a, and so a plurality of sixth openings EN1 may be formedin the encapsulation layer EN to expose each first pad set 110respectively in order to avoid the first pads 110 a being shielded.

As shown in FIG. 4, the flexible touch mother substrate 104 may at leastinclude two or more touch panel unit regions 104 a and further includesa second substrate 112, a plurality of touch panel devices 114 and aplurality of second pad sets 116. Each touch panel device 114 isdisposed corresponding to one of the second pad sets 116 respectively,and each touch panel device 114 and the corresponding second pad set 116can be disposed on the second surface 112 a of the second substrate 112in the corresponding touch panel unit region 104 a respectively.

Specifically, each second pad set 116 may include a plurality of secondpads 116 a, and the flexible touch mother substrate 104 may furtherinclude a plurality of conductive lines CL2 in each touch panel unitregion 104 a. Each second pad 116 a is electrically connected to thecorresponding touch panel device 114 by each conductive line CL2respectively, so that each touch panel device 114 can be electricallyconnected to the external circuit. Each touch panel device 114 can beused to detect a position that the touch object touches or approaches,and an area of each touch panel device 114 may be substantially coverthe display region of the corresponding display panel device 108 so asto fully integrate the touch function and the display function. Forexample, the area of each touch panel device 114 may be greater or equalto the area of the corresponding display panel device 108. In thisembodiment, each touch panel device 114 may define a range of a touchsensing region. For example, the range of each touch panel device 114may serve as the touch sensing region, and each second pad set 116 isdisposed in a peripheral region 114 a of the corresponding touch panelunit region 102 a respectively. Each touch panel device 114 may be forexample a mutually capacitive touch panel device, as shown in FIG. 5.Each touch panel device 114 may include a plurality of first axiselectrodes AE1 and a plurality of second axis electrodes AE2, in whicheach first axis electrode AE1 extends along the first direction D1, andeach second axis electrode AE2 extends along the second direction D2, sothe first axis electrodes AE1 and the second axis electrodes AE2 cancross each other and be capacitively coupled to each other to formsensing units at each crossing respectively. Also, in one touch paneldevice 114, the first axis electrodes AE1 and the second axis electrodesAE2 can be electrically insulated from each other through an insulationlayer IN, in which the second pads 116 a may be electrically connectedto the first axis electrodes AE1 and the second axis electrodes AE2.Accordingly, each touch panel device 114 can be electrically connectedto the external circuit. The first axis electrodes AE1 and the secondaxis electrode AE2 may be formed of two transparent conductive layersrespectively. Each transparent conductive layer may include indium tinoxide, indium zinc oxide, zinc oxide, conductive polymer, carbonnanotube, nanoparticles of indium tin oxide or metal nanowire, but notlimited thereto. The touch panel devices of the present invention arenot limited to the above-mentioned description. In another embodiment,each touch panel device 114 may also be another kind of touch structure,for example a single layer structure or self-capacitive touch paneldevice.

The second substrate 112 may be formed of a flexible substrate, such asa plastic substrate, a PI substrate, a PET substrate, a PET substrate, aCOC substrate or a PC substrate, and a bendable radius of the secondsubstrate 112 may be from 1 mm to 10 mm (R1˜R10), preferably from 1 mmto 5 mm (R1˜R5). For this reason, the flexible touch mother substrate104 can be flexible. For example, the first substrate 104 and the secondsubstrate 112 may be the same. A thickness of the first substrate 104and a thickness of the second substrate 112 may respectively range from5 to 60 micrometers. Furthermore, the second substrate 112 mayselectively be formed with an anti-fingerprint layer, a hard-coatinglayer, an anti-glare layer and/or an anti-reflective layer thereon. Inanother embodiment, the second substrate 112 may also be adhered to ahard or soft third substrate.

Next, step S12 is performed to form a plurality of first openings 118 inthe display mother substrate 102 and form a plurality of second openings120 in the flexible touch mother substrate 104. Each first opening 118is disposed in the corresponding display panel unit region 102 arespectively, and each second opening 120 is disposed in thecorresponding touch panel unit region 104 a respectively. It should benoted that since the first openings 118 penetrates through the displaymother substrate 102 and the second openings 120 penetrates through theflexible touch mother substrate 104, parts of any films formed on thefirst substrate 106 and the second substrate 112 corresponding to thefirst openings 118 and the second openings 120 will be removed duringthe step S12. For restrain the first pads 110 a and the second pads 116a from uselessness, the first openings 118 do not overlap the first pads110 a in a vertical projection direction Z1 of the display mothersubstrate 102. Also, each first opening 118 may be disposed in theperipheral region 108 a of the corresponding display panel unit region102 a for preventing the electrical connection between each displaypanel device 108 and the corresponding first pads 110 a and theoperation of each display panel device 108 from being affected. Thesecond openings 120 do not overlap the second pads 116 a in a verticalprojection direction Z2 of the flexible touch mother substrate 104, andeach second opening 120 may be disposed in the peripheral region 114 aof the corresponding touch panel unit region 104 a for preventing theelectrical connection between each touch panel device 114 and thecorresponding second pads 116 a and the operation of each touch paneldevice 114 from being affected. Further, in the step of forming thefirst openings 118, a plurality of fifth openings EN2 may be formed inthe encapsulation layer EN, and each fifth opening EN2 is disposedcorresponding to one of the first openings 118 respectively. In otherwords, each fifth opening EN2 is included in the corresponding firstopening 118.

FIG. 7 schematically illustrates a cross-sectional view taken along across-sectional line A-A′ of FIG. 6. As shown in FIG. 6 and FIG. 7,after forming the first openings 118 and the second openings 120, stepS14 is performed to adhere the flexible touch mother substrate 104 tothe display mother substrate 102 by an adhesive layer with the firstsurface 106 a of the first substrate 106 facing the second surface 112 aof the second substrate, for example turning over the flexible touchmother substrate 104 to make the display panel device 108 of the displaymother substrate 102 and the touch panel device 114 of the flexibletouch mother substrate 104 to be disposed face to face, as well as eachdisplay panel device 108 being disposed corresponding to one of thetouch panel devices 114 respectively to form a mother substrate assembly124. In the mother substrate assembly 124, each first opening 118 isdisposed corresponding to one of the second pad sets respectively, andeach second opening 120 is disposed corresponding to one of the firstpad sets respectively. Since the first openings 118 penetrate throughthe display mother substrate 102 and the second openings 120 penetratethrough the touch mother substrate 104, at least a part or all of thesecond pads 116 a of each second pad set 116 in the vertical projectiondirection Z1 of the display mother substrate 102 are disposed in thecorresponding first opening 118, and at least a part or all of the firstpads 110 a of each first pad set 110 in the vertical projectiondirection Z2 of the flexible touch mother substrate 104 (the same as thevertical projection direction Z1 after adhering) are disposed in thecorresponding second opening 120. That is, each first opening 118exposes the corresponding part or the corresponding all of the secondpads 116 a respectively, and each second opening 120 exposes thecorresponding part or the corresponding all of the first pads 110 a.Preferably, after adhering, each first opening 118 may expose thecorresponding second pad set 116, and each second opening 120 may exposethe corresponding the first pad set 110. Moreover, the adhesive layer122 does not overlap the first pad sets 110 and the second pad sets 116in the vertical projection direction Z1 of the display mother substrate102 so as to prevent the following step for electrically connecting thefirst pad sets 110 and the second pad sets 116 to the circuit boardsfrom being affected. In this embodiment, before adhering the flexibletouch mother substrate 104 to the display mother substrate 102, aplurality of third openings 126 and a plurality of fourth openings 128may be formed on the adhesive layer 122, in which the third openings 126and the fourth openings 128 penetrate through the adhesive layer 122.Furthermore, in the adhering step, each third opening 126 is disposedcorresponding to one of the first openings 118 respectively so as toexpose the corresponding second pad set 116, and each fourth opening 128is disposed corresponding to one of the second openings 120 respectivelyso as to expose the corresponding first pad set 110. For example, eachthird opening 126 may be greater than the corresponding first opening118, and each fourth opening 128 may be greater than the correspondingsecond opening 120, but not limited thereto. In a condition withoutshielding the second pad sets 116, each third opening 126 may be smalleror equal to the corresponding first opening 118. In a condition withoutshielding the first pad sets 110, each fourth opening 128 may be smalleror equal to the corresponding second opening 120. The adhesive layer mayinclude a transparent adhesive film, and a top surface and a bottomsurface of the transparent adhesive film may be adhered with a releasingfilm respectively before adhering, which helps the adhesive layer toform the third openings 126 and the fourth openings 128. After that, thereleasing films are removed while adhering. In another embodiment, thesize of the adhesive layer may only cover the display panel devices 108and the touch panel devices 114, and so the adhesive layer may not havethe openings.

In addition, in the step of adhering the flexible touch mother substrate104 to the display mother substrate 102, each touch panel device 114 maycover the corresponding display panel device 108 in the verticalprojection direction Z1 of the display mother substrate 102, so that theimage displayed by each display panel device 108 can be interacted withuser to perform input through the corresponding touch panel device 114.Also, the display panel devices 108 and the touch panel devices 114 donot overlap the first pad sets 110 and the second pad sets 116.

As shown in FIG. 8, step S16 is performed to cut the mother substrateassembly 124 to separate the display panel unit regions 102 a from eachother, thereby separating the display panel devices 108 to form aplurality of touch display units 130. Since each touch panel unit region104 a is disposed corresponding to the display panel unit region 102 a,the touch panel unit regions 104 a are also separated from each other inthe step S16, and the touch panel devices 114 can be divided.Specifically, the cutting process also cut the display mother substrate102 into a plurality of display panels DP and a plurality of flexibletouch panels TP. In this embodiment, each touch display unit 130includes one display panel DP and one flexible touch panel TPrespectively, in which the display panel DP is adhered to the flexibletouch panel TP through the adhesive layer 122. Each display panel DPcorresponds to one display panel unit region 102 a respectively so as toinclude one display panel device 108 and one first pad set 110. Eachflexible touch panel TP corresponds to one touch panel unit region 104 aso as to include one touch panel device 114 and one second pad set 116.Furthermore, the cutting process may be performed along the edges ofeach display panel unit region 102 a, but the present invention is notlimited thereto. In another embodiment, the edges of any two adjacentdisplay panel unit regions 102 a may be combined to be one edge, and theedges of any two adjacent touch panel unit regions 104 a may be combinedto be one edge. Accordingly, two adjacent touch display units 130 can beseparated only by cutting one time in the cutting process. Also, thecutting range may depend on the requirements. For example, the sizes ofthe touch display units 130 may be cut to be different, or the touchdisplay units 130 may be cut to include different numbers of the displaypanel devices 108 and the touch panel device 114.

As shown in FIG. 9, after forming the touch display units 130, step S18is performed to adhere and electrically connect a plurality of firstcircuit boards 132 to the first pad sets 110 respectively through thesecond openings 120 and the fourth openings 128 and adhere andelectrically connect a plurality of second circuit boards 134 to thesecond pad sets 116 respectively through the first openings 118 and thethird openings 126 so as to for a plurality of flexible touch displaypanels 100. For clarity, FIG. 9 shows the connection of single one touchdisplay unit 130, one first circuit board 132 and one second circuitboard 134, but the present invention not limited thereto. Each firstcircuit board 132 and each second circuit board 134 may be flexiblecircuit boards respectively so as to help the first circuit board 132and the second circuit board 134 to bend and extend into the openings tobe electrically connected to the pads, but not limited thereto.Specifically, each first circuit board 132 may be adhered andelectrically connected to the first pads 110 a of the correspondingfirst pad set 110 through an anisotropic conductive film (ACF) 136respectively, and each second circuit board 134 may be adhered andelectrically connected to the second pads 116 a of the correspondingsecond pad set 116 through an anisotropic conductive film 136respectively. It should be noted that in the method for manufacturingthe flexible touch display panel 100 of this embodiment, the displaymother substrate 102 is adhered to the flexible touch mother substrate104 first and followed by cutting the mother substrate assembly 124 intoa plurality of the display panels DP and a plurality of the flexibletouch panels TP, so that the process for adhering different displaypanels to different flexible touch panels repeatedly can be saved.Accordingly, the process steps for manufacturing the flexible touchdisplay panels 100 can be simplified so as to reduce manufacturing timeand saving manufacturing cost.

In this embodiment, the second substrate 112 can directly serve as acover substrate that the touch object touches. It is noted that the stepof adhering the flexible touch mother substrate 104 to the displaymother substrate 102 is performed with the first surface 106 a of thefirst substrate 106 facing the second surface 112 a of the secondsubstrate 112 in this embodiment, so that the display panel device 108and the touch panel device 114 are disposed between the first substrate106 and the second substrate 112 in the formed flexible touch displaypanel 100. Thus, the display panel device 108 and the touch panel device114 can be protected by the first substrate 106 and the second substrate112, and also, an extra cover substrate can be neglected by directlyserving the second substrate 112 as the outmost cover substrate in theflexible touch display panel 100 of this embodiment. Furthermore, sincethe first circuit board 132 and the second circuit board 134 aredisposed in the peripheral region 108 a, the operation of the displaypanel device 108 and the operation of the touch panel device 114 are notaffected by the first circuit board 132 and the second circuit board134.

Refer to FIG. 10, which schematically illustrates a cross-sectional viewof a flexible touch display panel according to a second embodiment ofthe present invention. As shown in FIG. 10, as compared with the firstembodiment, the display mother substrate of this embodiment may furtherinclude a first gas barrier layer 202 disposed between the display paneldevices 108 and the first substrate 106 and used to block moisture andgas (such as oxygen) outside the first substrate 106 from entering thedisplay panel devices 108 so as to prevent the moisture and oxygen fromaffecting the electrical performance and the lifetime of the organiclight-emitting diode. Specifically, the first gas barrier layer 202 isformed to cover the first surface 106 a of the first substrate 106before forming the display panel devices 108 on the first substrate 106in this embodiment, so that the first openings 118 penetrate through thefirst gas barrier layer 202, and the first gas barrier layer 202 mayhave a plurality of seventh openings 202 a disposed corresponding to thefirst openings 118 respectively and exposing the second pad sets 116respectively when forming the first openings 118. In this embodiment,the display panel DP′ of the formed flexible touch display panel 200 caninclude the first gas barrier layer 202 having the seventh opening 202a, and the first gas barrier layer 202 and the encapsulation layer ENencapsulate the display panel devices 108 thereby effectively stoppingthe gas (such as oxygen) and moisture. In another embodiment, the firstgas barrier layer 202 may also be formed on a surface of the firstsubstrate 106 opposite to the first surface 106 a. The first substrate106 of this embodiment may be preferably formed of the flexiblesubstrate, and since general flexible substrate has weak gas andmoisture blocking function, the first gas barrier layer 202 can be usedto block the gas and moisture outside the first substrate 106 in thisembodiment. In another embodiment, when the first substrate 106 isformed of glass, the display mother substrate may not have the first gasbarrier layer 202.

In addition, the flexible touch mother substrate may further include asecond gas barrier layer 204 disposed between the display panel device108 and the second substrate 112 and used to block the gas and moistureoutside the second substrate 112 from affecting the electricalperformance and lifetime of the organic light-emitting diode. In thisembodiment, the second gas barrier layer 204 is disposed on the secondsurface 112 a of the second substrate 112. Specifically, the second gasbarrier layer 204 can be formed to cover the touch panel devices 114after forming the touch panel devices 114, and thus, the second openings120 can penetrate through the second gas barrier layer 204 when formingthe second openings 120. Accordingly, the second gas barrier layer 204can have a plurality of eighth openings 204 a disposed corresponding tothe second openings 120 respectively and exposing the first pad sets 110respectively. Through the adhesive layer 122, the second gas barrierlayer 204 can be adhered to the display panel devices 108, so that thegas and moisture through the second substrate 112 can be blocked.Furthermore, since the second gas barrier layer 204 covers the touchpanel devices 114 after the formation of the touch panel devices 114,the second gas barrier layer 204 may further include a plurality ofninth openings 204 b disposed corresponding to the first openings 118respectively and exposing the second pad sets 116 respectively. Thus,the flexible touch panel TP′ of this embodiment may include the secondgas barrier layer 204 having the eighth openings 204 a and the ninthopenings 204 b. The first gas barrier layer 202 and the second gasbarrier layer 204 may be for example a stack or a mixture of organicmaterial or inorganic material, but not limited thereto. The inorganicmaterial may be closer to the display panel device 108 than the organicmaterial, but not limited thereto. The organic material may be forexample polyethylene terephthalate (PET), poly(ethylene naphthalate)(PEN) or PI. The inorganic material may be for example silicon oxide,aluminum oxide or silicon nitride. In another embodiment, since both theencapsulation layer EN and the second gas barrier layer 204 can blockthe gas and moisture outside the second substrate 112 from affecting theorganic light-emitting diode, the flexible touch display panel 200 mayselectively include the encapsulation layer EN and/or the second gasbarrier layer 204, preferably include the encapsulation layer EN. Inanother embodiment, the second gas barrier may be formed on the secondsurface 112 a of the second substrate 112 before forming the touch paneldevices 114, and then, the touch panel devices 114 are formed on thesecond gas barrier layer 204. Accordingly, the second gas barrier layer204 may be disposed between the second substrate 112 and the touch paneldevices 114, and only have the eighth openings 204 a.

Refer to FIG. 11, which schematically illustrates a cross-sectional viewof a flexible touch display panel according to a third embodiment of thepresent invention. For clarity, FIG. 11 shows a region corresponding tothe display panel device and the touch panel device, but the presentinvention not limited thereto. As shown in FIG. 11, as compared with thesecond embodiment, the flexible touch display panel 300 of thisembodiment may further include a third substrate 302 and anotheradhesive layer 304 disposed between the display panel device 108 and thesecond substrate 112. Specifically, the second gas barrier layer 204 isformed and disposed on the third substrate 302 and followed by adheringthe third substrate 302 to the display mother substrate 104 formed withthe display panel device 108 through the adhesive layer 304. Thus, theorganic light-emitting diode in the display panel device 108 can beprotected by the second gas barrier layer 204 before adhering theflexible touch mother substrate to the display mother substrate. Then,during forming the first openings 118, the first openings 118 alsopenetrate through the third substrate 302, the second gas barrier layer204 and the adhesive layer 304.

As the above-mentioned description, in the method for manufacturing theflexible touch display panel of the present invention, the flexibletouch mother substrate is adhered to the display mother substrate firstand followed by cutting the mother substrate assembly, so that theprocess steps for adhering different display panels to differentflexible touch panels repeatedly can be saved. Accordingly, the processsteps for manufacturing the flexible touch display panels can besimplified so as to shrink manufacturing time and save manufacturingcost.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the invention. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A flexible touch display panel, comprising: adisplay panel, comprising a first substrate, a display panel device anda plurality of first pads, the display panel having a first opening,wherein the first substrate has a first surface, the display paneldevice is electrically connected to the first pads, and the displaypanel device and the first pads are disposed on the first surface of thefirst substrate; a flexible touch panel, comprising a second substrate,a touch panel device and a plurality of second pads, the flexible touchpanel having a second opening exposing the first pads, and the touchpanel device and the second pads being disposed between the firstsubstrate and the second substrate, wherein the first opening exposesthe second pads; an adhesive layer, disposed between the display paneland the flexible touch panel, wherein the adhesive layer doesn't overlapthe first pads and the second pads in a vertical projection direction; afirst circuit board, electrically connected and adhered to the firstpads through the second opening; and a second circuit board,electrically connected and adhered to the second pads through the firstopening.
 2. The flexible touch display panel according to claim 1,wherein the adhesive layer has a third opening and a fourth opening, thethird opening is disposed corresponding to the first opening, and thefourth opening is disposed corresponding to the second opening.
 3. Theflexible touch display panel according to claim 1, wherein the displaypanel further comprises an encapsulation layer covering the displaypanel device and extending onto the first surface of the firstsubstrate, the encapsulation layer has a fifth opening disposedcorresponding to the first opening, and the fifth opening exposes thesecond pads.
 4. The flexible touch display panel according to claim 3,wherein the encapsulation layer has a sixth opening disposedcorresponding to the second opening, and the sixth opening exposes thefirst pads.
 5. The flexible touch display panel according to claim 1,wherein the display panel further comprises a first gas barrier layerdisposed between the display panel device and the first substrate, andthe first gas barrier layer has a seventh opening disposed correspondingto the first opening.
 6. The flexible touch display panel according toclaim 1, further comprising a second gas barrier layer disposed betweenthe display panel device and the second substrate, the second gasbarrier layer has an eighth opening disposed corresponding to the secondopening, and the second gas barrier layer further has a ninth openingdisposed corresponding to the first opening.
 7. The flexible touchdisplay panel according to claim 6, wherein the second substrate has asecond surface disposed opposite to the first surface of the firstsubstrate, and the second gas barrier layer is disposed on the secondsurface of the second substrate.
 8. A method for manufacturing aflexible touch display panel, comprising: providing a display mothersubstrate and a flexible touch mother substrate, wherein the displaymother substrate comprises a first substrate, a plurality of displaypanel devices and a plurality of first pad sets, each display paneldevice is disposed corresponding to one of the first pad setsrespectively, and the display panel devices and the first pad sets aredisposed on the first surface of the first substrate, and wherein theflexible touch mother substrate comprises a second substrate, aplurality of touch panel devices and a plurality of the second pad sets,each touch panel device is disposed corresponding to one of the secondpad sets respectively, and the touch panel devices and the second padsets are disposed between the first substrate and the second substrate;forming a plurality of first openings in the display mother substrateand forming a plurality of second openings in the flexible touch mothersubstrate; adhering the flexible touch mother substrate to the displaymother substrate by an adhesive layer with the first surface of thefirst substrate facing the second surface of the second substrate aswell as each display panel device being disposed corresponding to one ofthe touch panel devices respectively to form a mother substrateassembly, wherein the adhesive layer does not overlap the first pad setsand the second pad sets in a vertical projection direction, and whereineach first opening exposes one of the second pad sets respectively, andeach second opening exposes one of the first pad sets respectively;cutting the mother substrate assembly to separate the display paneldevices from each other so as to form a plurality of touch displayunits; and adhering and electrically connecting a plurality of firstcircuit boards to the first pad sets respectively through the secondopenings and adhering and electrically connecting a plurality of secondcircuit boards to the second pad sets respectively through the firstopenings to form a plurality of flexible touch display panels.
 9. Themethod for manufacturing the flexible touch display panel according toclaim 8, further comprising forming a plurality of third openings and aplurality of fourth openings in the adhesive layer before adhering theflexible touch mother substrate to the display mother substrate, whereineach third opening is disposed corresponding to one of the firstopenings respectively, and each fourth opening is disposed correspondingto one of the second openings respectively.
 10. The method formanufacturing the flexible touch display panel according to claim 8,wherein adhering the first circuit boards to the first pad sets andadhering the second circuit boards to the second pad sets are performedafter cutting the mother substrate assembly.
 11. The method formanufacturing the flexible touch display panel according to claim 8,wherein the display mother substrate further comprises an encapsulationlayer covering the display panel devices and extending onto the firstsurface of the first substrate, forming the first opening furthercomprises forming a plurality of fifth openings in the encapsulationlayer, each fifth opening is disposed corresponding to one of the firstopenings respectively, and the method further comprises forming aplurality of sixth openings in the encapsulation layer to expose eachfirst pad set respectively before forming the first openings.
 12. Themethod for manufacturing the flexible touch display panel according toclaim 8, wherein the display mother substrate further comprises a firstgas barrier layer disposed between the display panel devices and thefirst substrate.
 13. The method for manufacturing the flexible touchdisplay panel according to claim 8, wherein the flexible touch mothersubstrate further comprises a second gas barrier layer, and the methodfurther comprises forming the second gas barrier layer on the secondsurface of the second substrate before adhering the flexible touchmother substrate to the display mother substrate.
 14. The method formanufacturing the flexible touch display panel according to claim 8,wherein the flexible touch display panel further comprises a thirdsubstrate and a second gas barrier layer disposed between the displaypanel devices and the second substrate, and the method further comprisesforming the second gas barrier layer on the third substrate and adheringthe third substrate to the display mother substrate before adhering theflexible touch mother substrate to the display mother substrate.